Memfis said:
o,o
is it possible to explain how does this work to an ignorant person? because I'd like to know

The tune's played on the printhead's 24 solenoids with the printer probably operating in bi-directional graphics mode, so it's feeding raw data to the printhead instead of bitmap fonts. It's possibly based on the Dot Matrix Synth from 2003, but really can't say when all we see is the printer.